AutoMapper is a convention-based object-object mapper in .NET. Versions prior to 15.1.1 and 16.1.1 are vulnerable to a Denial of Service (DoS) attack. When mapping deeply nested object graphs, the library uses recursive method calls without enforcing a default maximum depth limit.
This allows an attacker to provide a specially crafted object graph that exhausts the thread's stack memory, triggering a `StackOverflowException` and causing the entire application process to terminate. Versions 15.1.1 and 16.1.1 fix the issue.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/LuckyPennySoftware/AutoMapper/commit/0afaf1e91648fca1a57512e…
security-advisories@github.com
https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v15.1.1
security-advisories@github.com
https://github.com/LuckyPennySoftware/AutoMapper/releases/tag/v16.1.1
security-advisories@github.com
https://github.com/LuckyPennySoftware/AutoMapper/security/advisories/GHSA-rvv3-…
security-advisories@github.com